The Inverted Pyramid by Bertrand W. Sinclair

Rod had come down the path with a club bag in one hand, talking amiably with his father. He had seen his trunk put aboard the _Haida_. Mrs. Wall, Laska, Isabel, Miss Sherburne, Grove, and three or four other unattached young men and women who made up the house party were on the float to see him off. They filled the quiet upper bay with light talk and low laughter. Rod stood by the deck rail chaffering with them. But his eye missed one figure. He had not seen Phil since breakfast. Already the engineer was priming the big motor. He could hear the hissing of air through open petcocks. And old Phil hadn't come down to say "good-by, kid."

Rod's glance wandered to Grove, standing by Laska Wall, a fine upright figure of a man in white flannels. And he wondered idly why this elder son of the house should be like flint to his brothers' steel without ever seeming aware of the hostile undercurrents he so often aroused. Or perhaps he simply did not care. Perhaps he felt such a complete assurance that the liking and loyalty of younger brothers was a negligible thing.